Affected persons of hepatitis a may be asymptomatic . those who have symptoms may have poor appetite , tiredness , nausea , vomiting , diarrhoea , fever , upper abdominal discomfort , jaundice and tea - colored urine 甲型肝炎的症状为食欲不振疲倦恶心呕吐腹泻发烧上腹不适黄疸，以及小便呈茶色，但患者亦可能全无症状。
The affected , including six women and six men aged from 15 to 61 , were members of a tour group visiting thailand from december 15 to 19 . they developed diarrhoea , abdominal pain , nausea and vomiting on december 18 and 19 受影响人士为6男及6女，年介乎15至61岁，参加一个旅行团12月15日至19日到泰国，他们于12月18日及19日出现肚痛呕吐腹泻作呕及发烧的徵状。
A spokesman for chp said that viral gastroenteritis caused by norovirus is usually self - limiting with symptoms of nausea , vomiting , diarrhoea , abdominal pain , slight fever and malaise . the symptoms may last for 24 to 48 hours 生防护中心发言人言说由诺沃克类病毒引致的病毒性肠胃炎的症状包括恶心呕吐腹泻腹痛轻微发烧及不适，症状可维持24至48小时并会自行消退。
